Calculating attachment for type-writing machines.



P. J. TILLMAN. v CALCULATING ATTACHMENT FOR TYPE WRITING MACHINES. APPLIOATION FILED JULY 8, 1907.

91 3,859. Patented Mar. 2, 1909.

11 SHEETS-SHEET 1.

THE uoRms PETERS co., wnsumorou, D. c.

' P. J. TILLMAN.

CALCULATING ATTACHMENT FOR TYPE WRITING MACHINES.

- APPLIOATION FILED JULY 8, 1907. 913 59 7 Patented Mar. 2, 1909.

I1 SHEETS-SHEET 2.

F J. TILLMAN.

GALGULATING ATTACHMENT FOR TYPE WRITING MACHINES.

APPLIUATIQN FILED JULY 8, 1907.

Patented Mar. 2, 1909.

11 SHEETSSHEET 3.

wmw.

wife??? THE mmms PETERS co. WASHINGTON, o. c

F. J. TILL'MAN. GALGULATING ATTACHMENT FOR TYPE WRITING MACHINES.

v APPLICATION FILED JULY 8, 1907. 913,859. Patented Mar. 2, 1909,

11 SHEETS-SHEET 4. v

n c. THE NORRIS PETERS cc.. WASHINGTON- .P. J. TILLMAN. CALCULATING ATTACHMENT FOR TYPE WRITING MACHINES.

APPLICATION FILED JULY 8, 190'].

Patented Mar. 2, 1909.

11 SHEETS-SHEET 5.

1H: NORRIS PETERS co., WASHINGTON, u. c.

F. J. TILLMAN.

CALCULATING ATTACHMENT FOB TYPE WRITING MAGHINES.

APPLICATION FILED JULY 8, 1907.

91 3,859. Patented Mar. 2, 1909 11 SHEETS-SHEET 6.

F. J. TILLMAN.

CALCULATING ATTACHMENT FOR TYPE WRITING MACHINES.

- APPLIOATION FILED JULY 8, 1907.

91 3,859. Patented Mar. 2, 1909.

ll SHEETS-SHEET 7.

jZmZZZWza7z,

Zita

4W m I I F. J. TILT-MAN. CALCULATING ATTACHMENT FOR TYPE WRITING MACHINES.

Patented. Mar. 2, 1909.

11 SHEETS-SHBET 8.

APPLIOATION FILED JULY 8, 1907.

F. J. TIL'LMAN. CALCULATING ATTAGHMENT FOR TYPE WRITING MAUHIHES. APPLICATION FILED JULY s, 1907.

91 3,859. Patented Mar. 2, 1909.

11 BHEBTS-BHEET 9.

ms NORRIS PETERS cc, WASHINGTON. n. c.

F. J. TILLMAN.

CALCULATING ATTAGHMENT FOR TYPE WRITING MACHINES.

APPLICATION FILED JULY 8, 1907. 7 913,859. Patented Mar. 2, 1909.

11 $HEBTS-SHEET 10.

114s NORRIS PETERS 00., wnsmuczcn', a c

F. J. TILLMAN. CALCULATING ATTACHMENT FOR TYPE WRITING MACHINES.

APPLIOATION FILED JULY 8, 1907.

'- Patented Mar; 2, 1909.

11 SHEETSSHEET 11.

UNITED STATES FERDINAND .T. TILLMAN, or ST. LoUIs MIsso'URI.

CALCULATING ATTACH KENT FOIt TYPE-WRITIHG ILOHIN'EB.

Specification of Letters Patent.

Application filed July 8", 1907. Serial 0.382,?8111,

To all whom it may concern:

.Be it known that I, FERDINAND J. T1LL- MAN, a citizen of the United States of America, residing in the city of St. Louis and State of Missouri, have invented certain new and useful Improvements in Calculating Attachments for Type-Writing Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification. Y

My invention relates to a calculating attachment for use in connection with a typewriting machine, the invention havin for its object to provide an. attachment 0 this character which may be associatedwith various types of typewriters and in which the actuating means of the registering mechanism is controlled through the medium of the platen carriage of the typewriting machine.

The invention has also for its object to provide in an attachment of this character mechanism whereby addition, multiplication and subtraction may be carried out in. a simple manner and in the use of which such work as the making out of bills and invoices into which the various forms of calculation specified may be readily carried out;

Another object is to produce an attachment of the character named that is controlled by the ordinary keys and key levers of a typewriting machine, thereby dispensing with complicated mechanism for this pur ose.

igure I is a top orplan view of a typewriting machine and my attachment associated therewith, the mam part of the'platen carriage of the typewriting machine bein" omitted. Fig. II is a view partly in vertical lon itudinal section and partly in elevation of t e tyizpewriting machine and my attach ment. ig. III is a vertical transverse section taken on line III-III, Fig. II and look ing toward the rear end of the ty ewriting machine and attachmentf Fig. I is area-r elevation of the calculating mechanism with the casing shown partly in vertical section. V is avertical lon itudinal section taken on line VV, Fig. V. Fig. VI is a plan view of the rear portion of one section of the multiplying mechanism. Fig. VI is a vertical section taken on line' VIVI*, Fi VI.- Fig. VII is a plan view of the multip ying mechanism at the opposite side ofthe machine from that at which the mechanism illustrated in Fig. VI is located. Fig.

VIII is a planlview of ai port of the register-.-.

latented March 2, 1909.

ing mechanism, members by which the registering-mechanismis operated and part of 'the multiplying mechanism key levers.

Fig. IX is a side elevation of the mechanism shown in Fig. VIII. Fig. X isa front elevation-of-the part of the registerin mechanism shown m Figs. VIII and I X with the casing illustrated in vertical section taken on line XX, Fig. IX. Fi XI is a transverse s'ection taken on line I-XI, Fig. I through the registering mechanism, a portion of' the registering wheels being shown infull lines and the remainder of said wheels being shown in dotted lines. Fig. XII is an enlarged cross section taken on line XII- XII, through one of the numeral wheels and the shaft on which the series of said wheels is mounted. Fi XIII is a cross 7 section taken on line XIII-XIII, Fig. X11 through three "of the numeral wheels. Fig. XIV is an enlarged vertical transverse section taken on line XIV-XIV,'Fig. v. Fig. XV is 9. er-

.spective view of one'of the numeral key ars of the typewriting machine, a ke lever having connection with said bar and t e members by which the power members of the calculating attachment are controlled.

g In the accompanying drawings the characters to be herein after used will indicate similar parts in thevarious views .inwhich they appear.

The type Limiting modifier-The typewrit- I ing machine with which I associate my attachment may be one of any ordinarytype in which a platen carriage is employed and inasmuch as my invention does not apper-. 'tain to the construction of the typewriting' machine-that is to be used, except as to certain members in--the machine that cooperate with the mechanism of my attachment, I will not describe the general construction of any typewriting machine but confine myself in the following description to the details that are necessary for an understanding of the operation of the typewriting machine andmy attachment in conjunction therewith. The typewriting machine contains the usual key board and key levers, the latter of which are connected to ty e bars in order that writing operations may e carried on. I'he key board also contains a full complement of numeral keys 1 which are mounted 11 on numeral key levers 2, the rear ends of which have pivotal connection with the frame of the typewriting machine and which are spring supported in a manner common to the support of key levers in the ordinary typewriter. 'l hese hey lovers are illustrated in 1*igs. I to Ill inclusive and Figs. IX and KY, in which latter view one of the hey levers is shown individually. Each numeral hey lever 2 has united toit a connecting rod 3, see Fig. XV, that leads to a numeral type bar 1 bearing a numeral type corresponding to that on the key of the numeral iicy bar joined to the particular type bar.

5 is a platen carriage in which is mounted the platen 6 that serves as a backing for the type of the type bars of the machine when they are operated to print upon a sheet of paper mounted in the carriage in the usual maimer. 'The platen carriage is designed to be operated in one direction from a suitable source of power, such as a springas usual in typewriting machines and its movement in such direction is controlled by suit able means, such as ratchet mechanism, whereby the carriage is caused to partake of a step by step travel.

The registering mechanism-This mechanism is located at the front end of my attachment and confined within the housing 7, see Figs. I, II and VIII to XI inclusive, that contains a sight 0 ening 8 through which the numerals upon t 1e numeral wheels of the registering mechanism may be viewed.

9 and 9 designate sections of a numeral wheel shaft that are supported in the housing 7 and the inner end of one of which is stepped into the inner end of the other, as seen in Figs. XI to XIII inclusive, the section 9 being rotatably mounted and the section 9 being preferably rigidly mounted.

The shaft section 9 bears a lmob 10 located exterior of the housing 7 by which the section may be rotated for a purpose to be here inafter mentioned and the knob is provided.

with a detent 11 adapted to engage a stop 12 rojecting from the adjacent end of the iousing.

13 are numeral wheels loosely mounted upon the shaft section 9 and 13 are numeral wheels loosely mounted upon the shaft section 9. These wheels are arranged in succession upon the two sections of the shaft and each wheel is provided with a peripheral flange whereby the wheel is rendered a chambered one in order that it may receive certain arts of the registering mechanism to be set torth. At the interior of the eripheral flange of each of the numeral wheehs 13 13 is a lug 14. At the side of each numeral wheel opposite to that which bears the flange just mentioned and rigidly associated with the wheel is a gear wheel 15.

16 is a shaft extending parallel with the numeral wheel shaft and upon which are loosely mounted transmission gear wheels 17 that mesh with the gear wheels 15 of the numeral wheels and are adapted to be driven to impart rotation to the numeral wheels by means to be described. Each numeral wheel also has'rigidly associated with it a pinion 18 that forms a part of the transfer or carrying means.

18) are pinion supporting arms rigidly sccured to the numeral wheel shaft and in each of which is journaled a primary or outer transfer pinion 20 and a supplemental or inner transfer pinion 21, the former being arranged in mesh with the latter, while the latter is arranged in mesh with the transfer pinion 18 that is carried by the adjoining numeral wheel. The transfer pinion 2t) is so arranged that a tooth of said pinion will always occupy a position to he struck by the lug 14 of air-adjacent numeral wheel, when said wheel is rotated, and irrespective of the direction of its rotation, whereby the pinion is rotated a distance corrcspomling to the space between two of its teeth. The moiion thus transmitted from a numeral wheel of one denomination causes a transfer from said numeral wheel to the next adjacent numeral wheel of another denomination, due to the primary transfer pinion acting in its turn lo rotate the secondary transfer pinion 131 and said secondary transfer pinion acting to rotate the transfer pinion 18 that is rigidly associated with the numeral nhccl of the second denomination.

The transferparts just described provide for transfer from one to another of both of the sets of numeral wheels 13 and 1?, irrespective of whether or not the shaft section on which the wheels are mounted remains stationary or is susceptible of rotation. 'lhe shaft section 9 on which the numeral wheels 13 are mounted. is rotatably mounted, however, in order that the numeral wheels 13 may be rotated independent of the numeral wheels 13 for the purpose of resetting them to -ZC1O after they have been utilized in calculations involving addition and multiplication. To this end 1 provide pawls 22 carried by thcarms 19 that are fixed to the shaft section 9 and which pawls revolve around said shaft section when it is rotated through the medium of its knob 10. Each pawl 22 is adapted to engage the lug 14 of the numeral wheel 13 adjacent thereto and which, when the shaft section 9 is rotated, is carried by the arm to which it is affixed, thereby causing the pawl to rotate the numeral wheel 13. Each pawl acts, as stated, upon a )articular numeral wheel 13 and as a resul t, the numeral wheels are rotated by the pawls until all of the lugs 14 of the wheels 13 are brought into alinement and the zero signs are caused to appear collectively through the sight opening in the registering mechanism housing.

- Immediately above the bottom of the registering mechanism housing are a pair of guide rods 23, see Figs. II and VIII to X inclusive. 24 is. a carriage that is slidably mounted upon said guide rods and is adapted to be moved longitudinally in the registering mechanism housing or transversely of the typewriting machine. The carriage bears a pointer 24 that extends to the top of the housing 7 and is adapted to traverse the series of numeral wheels in view through the sight opening 8 in said housing.

25 is a non-circular shaft, the ends of which are journaled in suitable supports, such as posts .26, within the housing 7 and by which said shaft is upheld at an elevation above the guide rods and parallel with said rods. The shaft 35 has fixed to it at one end a bevel gear wheel 27 to which power is applied in a manner to be explained for the purpose of rotating said shaft.

28 is a driving wheel slidably fitted to the shaft 25 to permit of its being moved longitudinally on the shaft but the bore of which wheel is shaped to correspond to the shaft to prevent rotation of the wheel independent of the shaft. The driving wheel 28 is straddled by the carriage 24 that serves as an engaging member for said wheel to shift it upon .its shaft. The driving wheel 28 is adapted to be brought into mesh with either of the transmission gear wheels 17 that engage the numeral wheels 13, 13 whereby, when the shaft 25 and the driving wheel are rotated the numeral wheel placed in gear with the driving wheel will be rotated to a degree corresponding to that of the driving wheel and a numeral upon the periphery of the particular numeral wheel which it is desired to bring into view will appear through the sight opening in the registering mechanism housing.

The numeral wheels 13 upon the fixed shaft section 9 are intended more particularly for use in calculations involving subtraction. None of these wheels has associated with it a pawl 22 such as are associated with thelnumeral wheels 13 and which are utilized for retrograde rotation of the wheels 13 when the shaft 9 is rotated. The wheels 13 may therefore be rotated in either direction by the driving wheels 28 and are consequently susce tible of em loyment in subtraction calcu ations as we as in addition and multiplication calculations. To restore the nu meral wheels 13 to zero it is necessary to ac tuate these wheels individually by imparting rotation to the driving wheel 23in engagement with the numeral wheels, and through the medium of the numeral key mechanism and power mechanism to be hereinafter described.

Mechanism for shifting the carriage of the registering mechanism.-To provide for the carriage 24 of the registering mechanism being shifted from one transmission gear wheel 17 to the next succeeding wheel 17 in a step by step manner throughout the extent of the which is fixed comprises a registering mechanism according to the step by step movement of the typewriterplaten carriage I employ the following parts: 29 is an endless chain that is united to the platen carriage of the typewriter by an arm 5 that extends rearwardly from said carriage as seen in Figs. I and II. The chain 29 is fitted to an idler 30 at one side of my attachment and it is. mounted on a wheel 31 that is associated with a bevel gearwheel 32 upon a shaft mounted at the side of the attachment opposite to that at which the idler, 30 is mounted. The bevelpinion 32 cooperates with a bevel pinion 33 that is fixed to a vertical shaft 34 journaled in a post 35 at its upper end which also serves .as a journal member for the shaft of the wheel 31 and bevel gear wheel 32. The lower end of the shaft 34 is journaled in a post 36 projecting upwardly from the base of the frame of the attachment, see Fig. II. 37 is a bevel gear wheel fixed to the lower end of the shaft 34.

38 is a horizontal shaft journaled at its rear end in the post 36 and to the rear end of a bevel pinion 39 that meshes with the ,wheel 37 of the shaft 34. The shaft 38 extends forwardly mechanism of the attachment and 1S journaled near its forward end in a post 40 lo cated at the rear of the registering mechanism housing. Upon the forward end of said shaft is a toothed wheel 41. 42 is an endless chain that is operably mounted on the wheel 41 of the shaft 38 and which extends to the opposite end of the registering mechanism and passes around an idler by which it is supported at said end. The chain, 42 is connected to the driving wheel carriage 24 of the registering mechanism, by an arm 24 extending from said carria e, as seen in Figs. II, VIII and IX, where y any movement imparted to said chain is imparted in a corres onding degree to said carriage, and it is to degree similar to the type-writer platen carriage from which motion is transmitted to the registering mechanism carriage through the medium of the mechanism previously described.

The main power mec7ia nism.43 designates the motor of my calculating attachment, see Fig. IV, which is located in the rear portion of the attachment. This motor drum having a power spr ng 111-- terior thereof by which said drum is rotated when the spring is placed under tension by winding it to store power therein similarly to the main spring of a clock or other time piece.

.44 is a power wheel, see Figs. IV and V, that is associated with the motor and oper ated thereby.

45' is a main power shaft that is rotatably to the registering.

5 also has rigidly thereto a pinion 46 arranged in mesh with the power wheel 44 and adapted to be driven thereby under the influence of the motor to rotate the power shaft. The power shaft mounted upon it, near one vs ide of the attachment, a master wheel 47 and near the other side of the attachment a master wheel 48.

49 is a non-circular shaft journaled in the frame of the attachment and having an extension 50 that projects through the frame at one of its sides and has fixed to it a bevel wheel 51, see Figs. II, 'VI and VI 52 is a power transmission pinion slidablyand non-rotatably mounted upon the noncircular shaft 49 and ada ted to be moved into and out of mesh Witi an intermediate transmission pinion 53 suitably supported and arranged in mesh with the master wheel 47, as seen in Fig. IV.

54 is a pinion slidably and non-rotatably mounted upon the non-circular shaft 49 near the side of the attachment opposite that at which the pinion 52 is located.

The-pinions 52 and 54 are spaced apart by an elongated gear sleeve 55 that has utility in conjunction with the multiplying mech anism of my attachment to be hereinafter described and to which nofurther reference will at present he made. The pinion 54 is adapted to be brought into cooperation with the master wheel 48 through the medium of an upper transmission pinion 56 that meshes with said master wheel and a lower reversing transmission pinion 57 arranged to receive the pinion 54. The pinions 52 and 54 are shifted upon the shaft 49 through the medium 'of a shifter yoke 58 slidably fitted to the shaft and engaging said pinions, the yoke being operated in a manner-to be hereinafter explained. It may be noted at this point that there being but a single intermediate transmission pinion 53 interposed between the master wheel 47 and the pinion 52, the shaft 49 is caused to rotate by said master wheel in one direction, whereas, there being two intermediate transmission wheels between the master wheel 48 and the pinion 54 when said pinion 54 is in mesh with the lowermost of said transmission pinions, the shaft 49 is rotated reversely to the direction in which it is rotated by the pinion 52.

59 is a power transmission shaft that is mounted in suitable bearings and which extends forwardly from the end of the extension 50 of the shaft 49 to the registering mechanism. This shaft bears at its rear end a bevel gear wheel 60 that meshes with the' bevel gear wheel 51 on the shaft extension 50 and it has fixed to it at its forward end a bevel gear wheel 61, see Figs. II, VI, VI and VIII to X inclusive. The last named bevel gear wheel meshes with the bevel gear wheel 27 fixed to the non-circular shaft 25 of the registering mechanism. f

It will be seen from the foregoing description that when the pinion 52 is in gear with the master wheel 47 power is transmitted from said master wheel to the shaft 49, then to the shaft 59 and to the shaft 25 bearing the driving wheel 28, whereby said driving Wheel, when in mesh with either of the transmission gear wheels 17 of mechanism, causes said transmission gear wheel to impart rotation to the corresponding numeral wheel 13, the numeral wheel being at such time moved in a forward direction relative to the numerals thereon. When the pinion 52 is thrown out of gear with the masterwheel 47 and the pinion 54 is thrown into gear with the master wheel 48, the mechanism just described that leads to the registering mechanism is operated reversely relative to the operation that has just been described and as a consequence, the numeral wheel that is being operated-is rotated backwardly relative to the numerals thereon. In the operation of'the numeral wheels in the direction first stated through the medium of the master wheel 47 and the gearing associated with it, including the pinion 52, addi tion is performed on the numeral wheels; whereas, when the pinion 52 is shifted out of mesh with the master wheel 47 and the pinion 54 is thrown into mesh with the master 9 wheel 48, thereby putting the last named *master wheel instead of the first named into position for cooperation with the shaft 49, the numeral wheels are rotated reversely relative to the direction oftheir movement in the first instance and subtraction instead of addition is performed upon the numeral wheels. In both the adding and subtracting calculations carrying action from numeral wheel to numeral wheel is accomplished through the medium of the lugs 14 of the numeral wheels that engage the outer transfer pinions 20 mounted in the shaft carried arms 19 and from which transfer pinions mot on is transmitted through the inner transfer pinions 21 and therefrom to the numeral wheel pinions 18. In this connection attentionis drawn to the fact that there are no pawls 22 carried by the arms 19 on the shaft section 9 and that therefore the numeral wheels 13 on this shaft section may be rotated in either a forward or a backward direction during carrying action.

- Numeral key mechanism for controlling the power and registering mechanism.-Each numeral key lever has attached to it at a point rearward from the attachment of the type bar connecting rod 3 a vertical connecting rod 62 that is provided at its upper end with a hook 63, see Figs. V, VI, VII and XV.

64 is a horizontal rock bar extending transversely of' the attachment and through a rearwardly extending flange 65 of which all of the connecting rods 62 extend loosely, the said rock bar having an ofiice to perform in the registering erases connectionwith said rods that will be hereinafter mentioned.

'66 is one of aseries of pull levers that are .pivotally mounted at their rear ends at 67,

see Fig. V, and which are normally supported bylift springs 68. This pulllever is provided at its forward end with a stud 69 to which the hook at the upper end of the connecting rod 62 is loosely fittedx Intermediate of the ends of the pull lever is a stud 70.

71 is a vertical connecting rod that is pro.

vided at its lower end with a hook 72 loosely fitted to the stud 70 andwhich passes beneath said stud. I

73 is a rock bar extending transversely of the attachment and having its ends suitably journaled in the frame of-the attachment, the said bar being provided with a rearwardly extending flange 74 through which all of the connecting rods 71 complementary to the various-numeral key levers pass loosely:

arms being normally held rearwardly and in retracted osition 'retractile springs 77, see Figs. V, V, 811 VI. One of the said hanger arms is provided at its rear edge with a shoulder 78. I Y

79 is a pivot rod mounted in the lower ends of the hanger arms 75 and extending transversely of the attachment.

80 are palletsloosely mounted intermediatc of their ends upon the pivot rod 79 and each comprising an arm extending forwardly from said rod and an arm extending rear wardly from said rod. The forward arm of each pallet has connected to it a connecting r0d'71 corresponding to a particular numeral it key'lever, w

7 ereby, when said key lever is operatedthe particular pallet 'will be rocked vertically, its forward end being moved I downwardly and its rear end being moved upwardly from the positions in which they are seen in Fig. V.

81 is a supporting rod mounted in the frame of the attachment and extending transversely thereof at a oint in front of the forwardends of the pa lets 80. l 82 is a rock bar located beneath'the forward arms of all of the pallets and which is connected to the sup orting rod 81 by ver tical arms 83, one of w ich has connected to it'a lift or retractile spring 84, see Fig. V.

In the arm of the rock shaft 82 that is located at the side of the attachment containing the master wheel 47 is a trip bolt 85 provided with a beveled point and backed by a spring 8 6 which normally holds the bolt projected rearwardly from the arm.

87 is a trigger pivotally 1nounted at88 intermediate of its ends, and which 18 nor mally held in a horizontal position against a surmounting stop 89' by a spring 90 so that the trip bolt 85 will normally rest against the forward end of said trigger to be in positioir, to impart a downward movement to the forward end of the trigger when the rock bar 82 is moved downwardly and an upward movement to the rear arm of the trigger at such time. In the rear arm of the-trigger is a notch 91. v

92 is a trip lever thatis pivotally supported at 93 immediately back of the trigger 87 and which is provided with a nose at its upper end that. is normally seated in the notch of said trigger,' being maintained in such position under the influence of a spring 94 that is connected to the trip lever beneath 99 is a pull lever that is pivotally mounted at 100 and located in front of the adjacent hanger arm 75. The pull lever 99 is united to the dog .95 by a rod 101 which serves to move said lever in a rearward direction when the dog is moved to disengage'it from the master wheel 47.

102 is across rod mounted in the frame of the attachment and whichserves as a pivotal support for a pair of rocker-bars 103, one of which is located at the side of the attachment containing the master wheel 47 and the othejr parts'just previously described; The

oint of the forward arm of the rocker bar ust mentioned normally occupies a position that causes it to engage the shoulder 78 of the hanger arm 75 seen in Fig. V, whereby the forward arm of said bar is held in a lowered position.

104 is a pull spring that is connected to the rear arm of the rocker bar 103 and which acts to elevate the forward arm of the bar when the hanger arm 75 is moved forwardly, thereby releasing the rocker from restraint as will hereinafter merc fully. appear.

105 is a shaft, the ends of which are jour naled in the two rocker bars 103 to rotate therein. Upon this shaft is a governor barrel 106 that is of a length equal to or greater than the space occupied transversely of the attachment by the pallets 80. The governor barrel bears at its periphery a series of trip pins 107 that are stepped in a spiral manner partially around the barrel and are so disposed relative to the pallets 80, that when the rear arm of either of said pallets is elevated, the extremity of said arm will lie in the path of travel of a particular trip pin that will cooperate with the particular pallet opposing it.

108 is a governor wheel that is fixed to the shaft 105 which carries the governor barrel 106. This governor wheel is normally arranged in mesh with the master wheel 47 when the parts are in readiness for calculation, but is adapted to be withdrawn from said master wheel upon the raising of the forward rocker arms 103 in which the shaft 105 is journaled.

109 is a retracting arm fixed to the shaft 105 and which is connected to the forward arm of the rocker bar 103 adjacent thereto by a retracting spring 110.

111 is a lever arm pivoted at 112 to the frame of the attachment adjacent to the shaft retracting arm 109 and which is united to the rear arm of the adjacent rocker bar 103 by a connecting rod 113.

The operation of the controlling mechanism is as follows: Whenever a numeral key lever 2 is actuated the corresponding pull lever 66 to which the key lever is connected is moved downwardly and, as a consequence of the attachment of said pull lever to the corresponding pallet 80, said pallet is rocked vertically to throw its rear arm into a position in front of the opposing trip pin upon the governor barrel. The forward arm of the pallet moves downwardly and as it so moves acts upon the rock bar 82 to carry it downwardly and cause its trip bolt 85 to exert pressure against the trigger 87 and throw the rear end of said trigger upwardly. Due to the movement of the trigger just stated, the trip lever 02 is released and the spring 94 attached thereto draws said trip lever rearwardly and the lower end of said lever, by riding against the cam face 98 of the dog 95, acts to so move the dog that its point is withdrawn from engagement with the master wheel 47, thereby freeing said master wheel and causing the pull lever 09 to be moved rearwardly to the adjacent hanger arm 75. It should be here stated that the several trip pins upon the governor barrel 106 are so disposed upon said barrel relative to the rear ends of the pallets 80 that said barrel may artake of a predetermined partial rotation fiefore the trip pin engages the pallet that opposes it. There is an individual trip in for each numeral key lever in the typewriting machine and the trip pin corresponding to each numeral key lever and the pallet connected to said lever is disposed u on the governor barrel in a position that wil permit of the governor barrel rotating to a degree that will allow the governor wheel 108 and the master wheel 47 to rotate in mesh with each other to an extent to cause said master wheel to operate the registering mechanism of the attachment almost the proper amount for the calculation to be made before the particular trip pin of the governor barrel acts upon the opposing pallet 80. F or the purpose of illustration it will be assumed that it is desired to add the numeral 3 upon any one of the numeral wheels of. the registering mechanism that is in registration with the driving wheel 28 of said mechanism. When the master wheel 47 is freed by the disengagement of the dog 95 therefrom in the manner explained and the rear end of the pallet 80 corresponding to the numeral 3 key lever is elevated, the master wheel par-takes of a degree of rotation sufficient to turn the governor wheel 108 in mcsh therewith and the governor barrel in the direction indicated by the arrows, Fig. V. The master wheel and governor wheel will rotate the distance of siX teeth of each wheel, or two teeth for each ,unit and upon this degree of rotation of the governor wheel taking place and during the engagement of the last teeth the proper trip pin will engage the opposing pallet 80 and force said pallet forwardly a distance sufficient to allow said wheels to rotate the distance of another tooth of each wheel, thereby completing the necessary degree of movement of the master wheel to permit of its actuating the registering mechanism to the desired degree and cause the calculation to appear upon the numeral wheel. The key lever that has been operated is held depressed during the operation of the parts as just described, in order that the corresponding pallet will be main tained in such position as to be struck by the approaching trip pin 10?. In the forward movement of the pallet as just stated, the hanger arm 75 illustrated in F ig. V is moved forwardly, due to the pallet pivot shaft being mounted in said arm and said hanger arm is caused to act upon the pull lever 99 with the result of moving said lever forwardly and causing it to return the dog 95 into engagement with the master wheel47 and prevent its further movement. The degree of forward movement of the hanger arm 75 just mentioned is su'liicient to draw the shoulder 78 of the hanger arm from engagement with the point of the adjacent rocker bar 103, and the forward arm of said bar together with the forward arm of the mating rocker bar at the opposite side of the attachment is thrown upwardly by the action of the pull spring 104 connected to said rocker bar. Upon the u p ward movement of the forward arms of said rocker bars the governor wheel 108 is withthe rocker bar 103, and it has the utility in addition to that just recited, of causing said retracting arm to operate upon the pull lever 111, whereby said pulllever is caused to ex ert a pull upon the connecting rod 118 and act through said connecting rod to elevate the rear arm of the rocker bar and lower the forward arm of the bar with the result of carrying the point of said bar back into engagement with the shoulder 7 8 of the hanger arm 75 and the governor wheel back into ,"mesh with the master wheel. The parts are thus returned to their normal positions ready for the next calculating operation.

To provide for the operation of the shifter yoke 58 in a direction transversely of the attachment for the pur ose of shifting the .pinions 52 and 54 at t e ends of the gear sleeve 55 and upon the shaft 49 to move the pinions into and out of cooperation with their complementary master wheels 47 and 48 I utilize a rockable shift rod 114 that is rovided with a throw arm 115 which is oosely seated in the shifter yoke at one of-its ends, as seen in Figs. II and V to VI inclusive. The shift rod '114 is mounted in suitable posts and extends forwardly from the shifter yoke to the registering mechanism,

. the rod being located alongside of the typeoperations without calculation. eing performed, I utilize the following mechanism.

117 is what I term an offset, key lever and 118 is what I term a i set key lever. These two key levers occupy positions at one side of the ty ewriting machine, as seen in Fig. I. 119, see V'and VII, is a main shift lever that is pivotally fitted intermediate of its ends to a stub shaft 120 rojecting outwardly from the frame of the ca culating attachment and the forward arm of which is united to the offset. key lever 117 by a connecting rod 121. end with a forward earn 122 and a rear cam 123, the said cams being located at one side of the shift lever. 124 is a lever arm fixed to the rocker bar 73 at its end adjacent to the shift lever 1 19 and which is located between the came of said shift lever. The lever arm is provided at its front and 'rear faces with cams which cooperate with the cams of said lever, whereby, when the shift lever is rocked vertically the cams will, by impingement against each other, cause a forward or rearward movement to be im-.

upon the forward arm of the main shift lever This shift lever is provided at its rear parted to the lever arm and the rocker bar' 73. 125 is an auxiliary shift lever that is pivotally fitted intermediate of its ends to a stub shaft 126 located adjacent to but. above the'stub shaft 120. The forward arm of the, lever 125 is united to the set key lever 118" by a connectin rod 127 and the rear arm. of said auxiliary ever is united to the forward arm of the main shift lever 119 by a link128. 129 is a retracting spring connected at its forward endto thelever arm 124 and at its rear end to the frameof the attachment. When the parts are in the positions illustrated in the drawings the members that are under control of the set and offset key lovers are in set positions and the calculating mechanism is in condition for service. To throw the calculating mechanism out of o eration to prevent its being affected by t e operation of the numeral key levers, the

Y offset key lever 118 is depressed and as. a

result the main shift lever 119 is .so moved that its rear arm moves upwardly and it's forward cam 122 by riding against the forward cam face of the lever arm 124 acts to move said lever arm rearwardly, thereby carrying the rocker bar 73 in a correspondingl direction and causing said rocker bar to move-all of the connecting rods 71 that pass through the rocker bar in a rearward direction. The hooks 72 of said connecting rods ,are therefore carried away from the studs 70 of the pull levers 66 so that said pull levers may operate in conjunction with the numeral key levers without exerting any action upon the connecting rods just mentioned and the pallets 80' of the calculating mechanism to which they are attached. To restore the connecting rods 71 it is only necessary to depress the set key lever 117' with the result of moving the rear arm of the auxiliary shift lever 125 u wardly and-creatinglan upward pull throng the medium of the 'nk 128 119. The rear arm of the main shift lever is 1 at this time moved downwardly and its cam 1123, by riding against the rear cam face of the lever arm 124, causes said lever armto move forwardly and the rocker bar 73 is thrown in a forward direction that causes it to return the hooks of-the, connecting rods 71 into 0 erable positions beneath the studs 70' of the pull levers 66. I

The multi lying mechgm ism'.-'13-0 vdesignates multip ication key levers, a part of 120 which are located at one side of the typewrit ing machine andthe remainderof which are located at the opposite side of said machine, as seen in Fig.1. These key levers are, pro-' vided with keysbearingnumerals from 2 to 9 and are pivotally'moun d intermediate of their ends; at 132, seeFigs. II, V, VI and VII, the leve'rjfhaving their rear portions bent transversely of the attachment at the rear of the typewriting machine into arms 131 that 180 p sleeve and rotated in a manner-tube ex extend to different degrees across the attachment, see Figs. V to VII inclusive and XIV.

133 designates a cross rod located adjacent to the arms of the key levers 130.

134 are cam levers loosely mounted upon the cross rod 133 and corresponding in number to the number of multiplication key levers. Each cam lever is provided with a forward cam face 135 against which therear arm of the key lever corresponding thereto is adapted to ride when moved upwardly from the position illustrated in Figs. V and XIV, whereby the upper arm of the cam lever is moved rcarwardly to cause it to act upon a part to be presently mentioned. Each of said cam levers has a lower arm to which is connected a retracting spring 137. At the rear of the upper arm of each cam lever is a cam 136.

138 are carrier bars of a number corresponding to the number of multiplication key levers and cam levers 134. These carrier bars are pivotally supported at 139 in posts 140 which are arrange d in a row transversely of the calculating attachment and have the carrier bars so fitted to them that the bars may he moved in an arc of a circle common to all of them. At the extremity of the forward arm of each carrier bar 138 is a cam face 141 which opposes the cam face 136 at the rear of the corresponding cam lever 134. It will be readily understood that when either of said cam levers is moved to throw its upper arm rearwardly said rear cam face 136 will operate upon the cam face 141 of the opposite carrier bar, whereby the forward arm of the carrier bar is elevated and the rear arm of said bar is lowered.

142 are toothed multiple wheels that are journaled to the rear arms of the carrier bars 138 and the size and number of teeth of which vary according to the integer of the multiplication key lever that is complementary to said wheel. F or instance, the multiple wheel complementary to the multiplication key lever bearing the numeral 2 is provided with twenty teeth. The multiple wheel corresponding to the numeral 3 key lever is provided with thirty teeth while the numeral 9 wheel corresponding to the numeral 9 multiplication key lever is provided with ninety teeth. All of said multiple wheels are adapted to be moved by the cam levers 134 to the gear sleeve 55 upon the shaft 49, which contains ten teeth, and it will i be seen thatwheu either of the multiple wheels is thrown into cooperation with sald plained, the multi le wheel in makinga complete rotation wil act with multlplymg actlon upon the sleeve and said sleeve will 1n turn transmit the motion it receives to the shaft 49 from which moti n is transmitted throu h the driving members leading from I sides thereof.

the attachment to operate the numeral wheels in the last mentioned mechanism with multiplying action.

Power is communicated to the multiple wheels 142 through the medium of the following parts: 143 is an auxiliary power shaft that is journaledin the frame of the calculating attachment and occupies a positi'cn'parallel with the main power shaft 45. This auxiliary power shaft has rigidly mounted upon it pinions 144 that are constantly in mesh with the master wheels 47 and 4S and which serve to operate said auxiliary shaft when the main shaft is in motion. The said auxiliary shaft also has fixed to it spur wheels 145 ofa number corresponding to the number of carrier bars 138, the forward arms of which carrier bars are located beneath said spur wheels, as seen in Figs. V, VI, and VII. 146 are short shafts journaled in the forward arms of the carrier bars, and extending transversely through the barsand-to opposite Upon each shaft 146 'at one side of the corresponding carrier bar is a pinion 147 which is adapted to be moved into mesh with the surmounting spur wheel 145 when the forward arm of the carrier bar is elevated through the medium of the o aposing cam lever 134. Fixed to each shaft 146 at the opposite'sidc of the carrier bar from that occupied by the pinion 147 is a bevel gear wheel 148. The bevel wheels just mentioned cooperate with bevel pinions 149 that are fixed to shafts 150 journaled in suitable bearings carried by the carrier bars 138 and extending longitudinally of said bars. Each shaft 150 has fixed to it at its rear end a bevel gear wheel 151 that is arranged in mesh with a bevel gear wheel 152 fixed to the spindle of the corresponding "multiple wheel 142 When either carrier bar 138 is moved, by reason of operation of a multiplication key lever 130 and the corresponding cam lever 134, the forward arm of the carrier bar is elevated to move the pinion 147 supported by said carrier bar into mesh with the surmounting spur wheel 145,

and when the spur wheel is driven with the auxiliary power shaft on which it is mounted, motion is transmitted from said auxiliary power shaft through the gearin associated 'withthe carrier bar to the mu ti 16 wheel carried by said carrier bar, and sai multiple wheel having-been lowered into mesh with the gear sleeve 55 beneath it-when the forward end of the carrier bar was elevated, the motion transmitted to the multiple wheel is in .turn communicated therefrom to said sleeve for the operation of the shaft 49 on which it is mounted and the o eration'of the registering mechanism,w1ich cooperates with said shaft. 153 are retracting springs connected to the forward arms of the carrier bars and by which said carrier bars are returned to their normal positions after they ported thereby I The operation of my calcu ating. attachhave beenactuated to move theparts -sup into operating osition's.

ment in multiplying action is as follows:

'When it is desired to multiply one number by another the multi lication key lever bearing oneof the mu tipliers is operated, with the result of, through the medium of the corresponding cam lever 134, 'movin the proper carrier *bar 138 so that the mu t1 le wheel supported thereby is moved ,to t e gear sleeve 55 and the pinion '147- at the o posite end of said carrier bar 18 moved to t e surmounting spur wheel 145 upon the auxiliary power shaft 143;

ower shaft 45, said pow'er'shaft is released or operation u onthe multiplying mechanism together with the master wheels 47 and 1 48, such release being accomplished in the same manner as that carried 'out in the addition and subtraction operations previously described and by virtue ofthe actuation of one of the numeral keylevers? of the tpyewriting machine which bears the multipli:

which multiplication is carried out it will be cand. v

To illustrate yexample the manner in assumed that it is desired to multi ly 5 by 4. In erforming the calcu tion the multiplication lever bearing the multiplier numeral 4 upon its key is first de ressed for the purpose of moving the multip icatio'n mechanism into position to cooperate with the other mechanisms of the calculating attachment. This lever operates upon the cam lever 134 that opposes the'carrier bar 138 in which is mounted the multiplewh'eel 142 that is complementary to the multiplication key lever bearing the multiplier 1111 meral 4. The cam lever just mentionedv acts to move the forward arm of the carrier bar 11 wardly and the rear arm of said carrier bar ownwardly, whereby the pinion 147 supported by the forward arm of the carrier bar is moved into mesh with the spur wheel 145 above it upon the-auxiliary ower shaft 144iand the multiple wheel at t e opposite end ofthe carrier bar is moved into mesh with the gear sleeve 55. The numeralkey;

lever'2 of the typewriting machine bearing the multiplicand numeral 5 is next operated and acts through the mechanism previouslydescribed to impart movement to the pallet 80 corres onding thereto, whereby the orward arm 0 said pallet is moved downwardly and the rear arm of thepallet is moved upwardly; The forward arm of the pa'll t, by acting upon the rock bar 82, depresses said rock bar'and causes it to trip the trigger 87,

j themedium' of the trip lever 92, whereby t e 66 two master wheels 47 and48 are freed to ro with the result of permittin there ease of the dog 95 from the master w eel 47 throu h The multiplying mechanism being now in condition vfor serv ice to be. actuated by power from the main "hate teeth of the I i v l tate with the motor driven main (power shaft 45. Th master wheels then, us to their vbein g red to the auxiliary power shaft 143 by t e pinions 144, serve to drive the auxiliary power shaft 143 and motion is imparted to the multiple wheel 142 through the mediumof the spur wheel 145 on the auxiliary shaft, the pinion 147 supportedb the previously operative carrier bar an in mesh with the particular spur wheel mentioned, and the operating members leading from the inion just referred to to the multiple wheel.

he main power shaft and the master wheels carried-thereby, which have been released in 'themanner stated, rotate for the actuation of j the multiple wheel, their rotation being continned until the dog 95 is again thrown mto engagement with the master wheel 47 in the same manner as that described with refer ence to addition and subtraction calculations. The period of this operation is controlled by the governor barrel 106 and the governor wheel 108 that cooperates with the Inaster wheel ilsiprovided with forty teeth arran ed to mesh with the teeth of the master wheel 47- and the 47 The governor wheel 108 trip ins carried by the governor barrel 1'06 are sposed upon said barrel opposite to each alternate tooth of said governor wheel.

As the main power shaft 45 rotates and the,

master wheels 47 and 48 move withit and said master wheels, by cooperation with the inions 144, rotate said pinions and theauxiliary power shaft 143. The pinions 144 are each rovided with twentyteeth and the spur w eels 145 which mesh with the pinions 147 are each provided with ten teeth.

' Inasmuch as the trip pins 107 of the overnor barrel-10oaredisposed o posite a terovernor w eel 108 said governor wheel an governor barrel are, in the example taken, permitted to partake of a degree of rotation t at is equivalent of a distance upon said governor wheel containing ten of its, teeth,

overnor barrel performs its office of actuator double the total of the, multiplicand 51", before the trip pin of the mg the opposing pallet 80 for the purpose of I throwing the controlling mechanism of the attachment out of operation in the manner previously explained. Now, as the governor wheel moves a distance corresponding to ten by' said of its teethit acts in its movement to impart in mesh with the master wheel 47. inions 144, with which said master 

